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ELF emissions observed by the EXOS‐D satellite around the geomagnetic equatorial region
Author(s) -
Sawada Akira,
Kasahara Yoshiya,
Yamamoto Masayuki,
Kimura Iwane,
Kokubun Susumu,
Hayashi Kanji
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl00040
Subject(s) - cyclotron , satellite , geostationary orbit , physics , earth's magnetic field , ion , ionosphere , magnetosphere , magnetic field , geomagnetic storm , geophysics , van allen radiation belt , atmospheric sciences , astronomy , quantum mechanics
As was introduced in the paper by Kimura et al. [1990], interesting ELF emissions in the frequency ranges above the cyclotron frequencies of He + and/or O + have been detected by ELF subsystem of the EXOS‐D satellite. This paper is to propose that these emissions are ion cyclotron mode emissions trapped along the magnetic field lines around the magnetic equatorial plane, which are very similar phenomena detected in frequencies around the He + cyclotron frequency, F He+ by GEOS 1 and 2 nearly the geostationary altitude. The propagation characteristics can be confirmed by ray tracing including the effects of ions.